The **M2TT-1E-R/N** is a specific part number for a subminiature toggle switch, typically manufactured by **NKK Switches**. It belongs to the M2 series, known for its high reliability and compact design, often used in telecommunications, medical equipment, and industrial controls. --- ### 1. Technical Specifications The part number can be decoded to understand its specific electronic and physical characteristics: | Feature | Specification | |:---|:---| | **Series** | M2 (Process Sealed Subminiature Toggle) | | **Circuit** | SPDT (Single Pole Double Throw) | | **Switch Function** | ON - NONE - ON (Maintained) | | **Actuator** | 1E (Standard Toggle - approximately 12.7mm length) | | **Terminals** | R (Right Angle PC Mount) | | **Contact Material** | N (Gold plated contacts) | | **Electrical Capacity** | 0.4VA maximum @ 28V AC/DC maximum | --- ### 2. Key Electronic Features #### Contact Rating (Logic Level) The "N" designation indicates **Gold Contacts**. This is critical for electronic circuits where: * **Low Current/Voltage:** It is designed for "logic level" applications (0.4VA max). * **Oxidation Resistance:** Gold does not oxidize like silver, ensuring a reliable connection even if the switch is not used frequently. #### Process Sealing The M2 series is generally **process sealed**. This means: * It can withstand automated soldering processes. * It is resistant to cleaning solvents (washable), preventing flux or contaminants from entering the internal contact mechanism. #### Terminal Configuration The **"R"** suffix indicates a **Right Angle PC Mount**. * The switch sits horizontally on a Printed Circuit Board (PCB). * The actuator protrudes out the side (parallel to the board), making it ideal for edge-of-board mounting in thin enclosures. --- ### 3. Physical Dimensions (Approximate) | Dimension | Measurement | |:---|:---| | **Bushing Diameter** | 6.0mm | | **Actuator Length** | 12.7mm | | **Pitch** | 2.54mm (Standard 0.1" for PCBs) | --- ### 4. Typical Applications Due to its gold contacts and small footprint, this part is commonly found in: 1. **Handheld Instruments:** Where space is limited. 2. **Logic Switching:** Interfacing directly with Microcontrollers (MCUs) or FPGAs. 3. **Medical Devices:** Where reliability and sealing are mandatory for sterilization or cleaning.